#!/bin/sh
+#
+# Runs a simple test (default: ./test/userprog.o)
+# Syntax:
+# ./run.sh [test program] [OPTIONS]
+# ./run.sh [OPTIONS]
+# ./run.sh [gdb [test program]]
+#
+# If you include a 'gdb' argument, the your program will be launched with gdb.
+# You can also supply a test program argument to run something besides the
+# default program.
+#
+
+BIN=./test/userprog.o
+PREFIX=
export LD_LIBRARY_PATH=.
-./model
+
+[ $# -gt 0 ] && [ "$1" = "gdb" ] && PREFIX=gdb && shift
+[ $# -gt 0 ] && [ -x "$1" ] && [ -f "$1" ] && BIN="$1" && shift
+
+set -x
+$PREFIX $BIN $@